(function () {
    'use strict';

    var byId = function (id) { return document.getElementById(id); },

        loadScripts = function (desc, callback) {
            var deps = [], key, idx = 0;

            for (key in desc) {
                deps.push(key);
            }

            (function _next() {
                var pid,
                    name = deps[idx],
                    script = document.createElement('script');

                script.type = 'text/javascript';
                script.src = desc[deps[idx]];

                pid = setInterval(function () {
                    if (window[name]) {
                        clearTimeout(pid);

                        deps[idx++] = window[name];

                        if (deps[idx]) {
                            _next();
                        } else {
                            callback.apply(null, deps);
                        }
                    }
                }, 30);

                document.getElementsByTagName('head')[0].appendChild(script);
            })()
        },

        console = window.console;


    if (!console.log) {
        console.log = function () {
            alert([].join.apply(arguments, ' '));
        };
    }


    Sortable.create(byId('foo'), {
        group: "words",
        animation: 150,
        store: {
            get: function (sortable) {
                var order = localStorage.getItem(sortable.options.group);
                return order ? order.split('|') : [];
            },
            set: function (sortable) {
                var order = sortable.toArray();
                localStorage.setItem(sortable.options.group, order.join('|'));
            }
        },
        onAdd: function (evt){ console.log('onAdd.foo:', [evt.item, evt.from]); },
        onUpdate: function (evt){ console.log('onUpdate.foo:', [evt.item, evt.from]); },
        onRemove: function (evt){ console.log('onRemove.foo:', [evt.item, evt.from]); },
        onStart:function(evt){ console.log('onStart.foo:', [evt.item, evt.from]);},
        onSort:function(evt){ console.log('onStart.foo:', [evt.item, evt.from]);},
        onEnd: function(evt){ console.log('onEnd.foo:', [evt.item, evt.from]);}
    });


    Sortable.create(byId('bar'), {
        group: "words",
        animation: 150,
        onAdd: function (evt){ console.log('onAdd.bar:', evt.item); },
        onUpdate: function (evt){ console.log('onUpdate.bar:', evt.item); },
        onRemove: function (evt){ console.log('onRemove.bar:', evt.item); },
        onStart:function(evt){ console.log('onStart.foo:', evt.item);},
        onEnd: function(evt){ console.log('onEnd.foo:', evt.item);}
    });


    // Multi groups
    Sortable.create(byId('multi'), {
        animation: 150,
        draggable: '.tile',
        handle: '.tile__name'
    });

    [].forEach.call(byId('multi').getElementsByClassName('tile__list'), function (el){
        Sortable.create(el, {
            group: 'photo',
            animation: 150
        });
    });


    // Editable list
    var editableList = Sortable.create(byId('editable'), {
        animation: 150,
        filter: '.js-remove',
        onFilter: function (evt) {
            evt.item.parentNode.removeChild(evt.item);
        }
    });


    byId('addUser').onclick = function () {
        Ply.dialog('prompt', {
            title: 'Add',
            form: { name: 'name' }
        }).done(function (ui) {
            var el = document.createElement('li');
            el.innerHTML = ui.data.name + '<i class="js-remove">✖</i>';
            editableList.el.appendChild(el);
        });
    };


    // Advanced groups
    [{
        name: 'advanced',
        pull: true,
        put: true
    },
        {
            name: 'advanced',
            pull: 'clone',
            put: false
        }, {
        name: 'advanced',
        pull: false,
        put: true
    }].forEach(function (groupOpts, i) {
        Sortable.create(byId('advanced-' + (i + 1)), {
            sort: (i != 1),
            group: groupOpts,
            animation: 150
        });
    });


    // 'handle' option
    Sortable.create(byId('handle-1'), {
        handle: '.drag-handle',
        animation: 150
    });


    // Angular example
    angular.module('todoApp', ['ng-sortable'])
        .constant('ngSortableConfig', {onEnd: function() {
                console.log('default onEnd()');
            }})
        .controller('TodoController', ['$scope', function ($scope) {
            $scope.todos = [
                {text: 'learn angular', done: true},
                {text: 'build an angular app', done: false}
            ];

            $scope.addTodo = function () {
                $scope.todos.push({text: $scope.todoText, done: false});
                $scope.todoText = '';
            };

            $scope.remaining = function () {
                var count = 0;
                angular.forEach($scope.todos, function (todo) {
                    count += todo.done ? 0 : 1;
                });
                return count;
            };

            $scope.archive = function () {
                var oldTodos = $scope.todos;
                $scope.todos = [];
                angular.forEach(oldTodos, function (todo) {
                    if (!todo.done) $scope.todos.push(todo);
                });
            };
        }])
        .controller('TodoControllerNext', ['$scope', function ($scope) {
            $scope.todos = [
                {text: 'learn Sortable', done: true},
                {text: 'use ng-sortable', done: false},
                {text: 'Enjoy', done: false}
            ];

            $scope.remaining = function () {
                var count = 0;
                angular.forEach($scope.todos, function (todo) {
                    count += todo.done ? 0 : 1;
                });
                return count;
            };

            $scope.sortableConfig = { group: 'todo', animation: 150 };
            'Start End Add Update Remove Sort'.split(' ').forEach(function (name) {
                $scope.sortableConfig['on' + name] = console.log.bind(console, name);
            });
        }]);
})();



// Background
document.addEventListener("DOMContentLoaded", function () {
    function setNoiseBackground(el, width, height, opacity) {
        var canvas = document.createElement("canvas");
        var context = canvas.getContext("2d");

        canvas.width = width;
        canvas.height = height;

        for (var i = 0; i < width; i++) {
            for (var j = 0; j < height; j++) {
                var val = Math.floor(Math.random() * 255);
                context.fillStyle = "rgba(" + val + "," + val + "," + val + "," + opacity + ")";
                context.fillRect(i, j, 1, 1);
            }
        }

        el.style.background = "url(" + canvas.toDataURL("image/png") + ")";
    }

    setNoiseBackground(document.getElementsByTagName('body')[0], 50, 50, 0.02);
}, false);
